MCQ
Consider the following $E_1 /S_{N^1}$ reaction
The missing product $(s)$ is $(are)$
- ✓$1, 2$ and $3$
- B$3$ and $4$
- C$2$ and $3$
- D$1, 2, 3$ and $4$
The missing product $(s)$ is $(are)$

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Reason : There is delocalisation of electrons from filled $d$ orbitals into the empty orbitals on the $CO$ ligands.

$C{H_3} - \mathop {\mathop {C = }\limits_{|\,\,\,\,} }\limits_{C{l_{}}\,} \mathop {\mathop {C\, - }\limits_{|\,\,\,\,\,\,} }\limits_{C{H_3}\,} \mathop {\mathop {CH - \,}\limits_{|\,\,\,\,\,\,\,\,\,} }\limits_{{C_2}{H_5}\,} C{H_2} - C \equiv CH$
Product $Z$ is